🇧🇪 Made for Belgians
Belgian admin,
finally clear.
Buy or rent? Employee or self-employed? Energy grants? We untangle it all — personalized quizzes and regional info.
The main topics
See all →🏠
Quiz available
Buy or rent?
We help you decide based on your situation, region and finances. Registration duties, exemptions, borrowing capacity — everything explained.
✦ 6 questions · ~4 min
💼
Quiz available
Professional status
Self-employed, employee, freelancer... each status has its own rules.
✦ 5 questions · ~2 min
💰
Savings & investments
Savings account, funds, pension savings, government bonds — what to choose?
⚡
Energy & renovation
Heat pump grants, solar panels, regional schemes — by region.
🚗
Car & mobility
Company car, leasing, bike — 2026 taxation decoded.
💊
Health & insurance
Reimbursements, MAF cap, BIM status, hospital insurance.
👶
Family & parenthood
Parental leave, family allowances, childcare.
See all →
All 7 topics, the quizzes and the regional guides, on one page.
One quiz,
one answer
made for you.
No jargon, no "it depends". Choose your topic, answer the questions and we point you to what really fits your situation.
Which topic interests you?
Info by region
Compare all →
Decisio's interactive tools
Three calculators to make informed decisions. Free, no signup, real-time results.
💰 Salary
Belgian net salary
Gross to net with social contributions, income tax, employment bonus, family allowance and extras. 2026 brackets.
Calculate my net →
📈 Markets
ETF & stock investment
Compound interest, monthly DCA, full Belgian 2026 tax treatment. 30-year chart + savings/inflation comparison.
Simulate my ETFs →
🏠 Real estate
Property ROI calculator
Gross/net yield, monthly cash flow, total ROI. With evolution charts and year-by-year timeline.
Analyse my property →
They used Decisio
🏠 Buy or rent
I thought buying in Brussels was beyond my reach. Thanks to the quiz, I discovered the €200,000 exemption — I saved more than €20,000 in fees on my apartment.
👩
Sarah M.
💼 Professional status
I wanted to go freelance but understood nothing about social charges. The employee/self-employed comparison gave me clarity in 10 minutes flat.
👨
Thomas K.
⚡ Energy & renovation
I didn't know Wallonia had so many heat pump grants. I was able to stack several aids and finance my renovation at more than 60% through subsidies.
👩
Marie-Claire D.